Research the causes of related medical symptoms such as: 1  Eye. 2  Eye symptoms (5412 causes) 3  Eye disease. 4  Eye disorder. 5  Eye problem (5412 causes) 6  Eye pain (475 causes) 7  Itch (1068 causes) 8  more symptoms...Â».
How to read the Histogram. A histogram is a graphical representation of the pixels exposed in your image. The left side of the graph represents the blacks or shadows, the right side represents the highlights or bright areas and the middle section is mid-tones (middle or 18% grey).
To construct a histogram from a continuous variable you first need to split the data into intervals, called bins. In the example above, age has been split into bins, with each bin representing a 10-year period starting at 20 years.he major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.